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Minutes
Joshua Alexander https://docs.google.com/presentation/d/1-9L8OkVl-w5GmbFYmV3mfrPeIWW8XqER/edit?usp=sharing&ouid=115125070153404772120&rtpof=true&sd=true
1.1 V
tap and continuous connection to VDDD resulted in successful scum firmware execution when programmed via 3wb from nRF
Gets stuck in optical calibration mode only if programming from 3wb from nRF
1.8 V
Four different programming methods were not successful
1.1 V tap results are promising with regard to only needing resistors to generate 1.1 V instead of regulator
Use expected VDDD current to size resistor from 1.8 V nRF pin to 1.1 V VDDD via 0.7 V drop over the resistor
Still need to make a cohesive picture of voltage ripple with DC/DC converter and printed battery at high time resolution
Kristofer PISTER recommended using a spare Sulu board to analyze 1.8 V DC/DC ripple vs input voltage range over battery discharge range and load current in boot/sleep/TXRX modes
Next recommended test is lighthouse functionality verification
Very basic sensor ADC test appreciated too
PCB assembly revision plan made